When Denver’s No. 1 offense (yards/points per game) faces Seattle’s No. 1 defense (fewest yards/points allowed) on Sunday, it will mark the fifth such match-up in Super Bowl history. Each day, we’ll look at one of the four previous games:

SUPER BOWL XII (1978)

Pittsburgh (top defense) vs. Dallas (top offense)

Date: Jan. 21, 1979.

Score: Steelers 35-31.

MVP: Steelers quarterback Terry Bradshaw.

Site: Orange Bowl, Miami.

Closing line: Steelers by 3.5.

Game highlights:

*Pittsburgh outgained Dallas 357-330.

*Bradshaw was 17-of-30 passing for 318 yards and four touchdowns.

*John Stallworth caught three passes (two touchdowns) for 115 yards and Lynn Swann had seven catches for 124 yards and one touchdown.

*Dallas was denied a repeat – it had beat Denver the previous year.

*The Steelers won their third championship in five years and would add a fourth after the 1979 season.

*Pittsburgh led 35-17 in the fourth quarter after Swann’s 18-yard TD catch.

*Among the assistant coaches in the game – Tom Moore and George Perles for Pittsburgh; Dan Reeves, Mike Ditka and Gene Stallings for Dallas.